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#!/usr/bin/perl -w

=head1 NAME

dh_installwm - register a window manager

=cut

use strict;
use Debian::Debhelper::Dh_Lib;

=head1 SYNOPSIS

  dh_installwm [debhelper options] [-n] [--priority=n] [wm ...]

=head1 DESCRIPTION

dh_installwm is a debhelper program that is responsible for
generating the postinst and postrm commands that register a window manager
with L<update-alternatives(8)>

Any window manager programs specified as parameters will be registered in
the first package dh_installwm is told to act on. By default, this is the
first binary package in debian/control, but if you use -p, -i, or -a flags,
it will be the first package specified by those flags.

Files named debian/package.wm can list other window manager programs to
register.

=head1 OPTIONS

=over 4

=item B<--priority=>I<n>

Set the priority of the window manager. Default is 20, which is too low for
most window managers; see the Debian Policy document for instructions on
calculating the correct value.

=item B<-n>, B<--noscripts>

Do not modify postinst/postrm scripts. Turns this command into a no-op.

=item I<wm ...>

The commands used to run the window manager or window managers you want to
register.

=head1 NOTES

Note that this command is not idempotent. "dh_clean -k" should be called
between invocations of this command. Otherwise, it may cause multiple
instances of the same text to be added to maintainer scripts.

=back

=cut

init();

if (! defined $dh{PRIORITY}) {
        $dh{PRIORITY}=20;
}

if (@ARGV) {
	# This is here for backwards compatability. If the filename doesn't
	# include a path, assume it's in /usr/X11R6/bin.
	if ($ARGV[0] !~ m:/:) {
		$ARGV[0]="/usr/X11R6/bin/$ARGV[0]";
	}
}

foreach my $package (@{$dh{DOPACKAGES}}) {
#	my $tmp=tmpdir($package);
	my $file=pkgfile($package,"wm");

	my @wm;
	if ($file) {
		@wm=filearray($file, '.');
	}

	if (($package eq $dh{FIRSTPACKAGE} || $dh{PARAMS_ALL}) && @ARGV) {
		push @wm, @ARGV;
	}

	if (@wm && ! $dh{NOSCRIPTS}) {
		foreach (@wm) {
			autoscript($package,"postinst","postinst-wm","s:#WM#:$_:;s/#PRIORITY#/$dh{PRIORITY}/",);
			autoscript($package,"prerm","prerm-wm","s:#WM#:$_:");
		}
	}
}

=head1 SEE ALSO

L<debhelper(1)>

This program is a part of debhelper.

=head1 AUTHOR

Joey Hess <joeyh@debian.org>

=cut